Researchers have demonstrated that they can discern individual letters on a display based only on the ultrasonic whine it emits.

How humans can communicate with aliens.

If “Location History” was off, Google said it didn’t keep data—but that’s not true.

Facebook won’t tell you exactly why it does or doesn’t trust you.

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Facebook revealed this week it’s trying to stem the flow of fake news by assigning trust values to users. It insists on keeping its criteria for trustworthiness secret though, in case untrustworthy people try to game the system — and they almost certainly will.

Tessa Lyon, Facebook‘s product manager, told The Washington Post a bit more about the system, in which the company uses several flags to identify which people on the site are more trustworthy than others. It rates users on a scale of zero to one. The only judging metric she would admit to is a person’s history of reports.

It’s called Hard Fork.

Click on photo to start video.

Valorize as pessoas pelo que elas sao.

Many small devices require batteries, but they can be expensive and environmentally unfriendly. Paper batteries powered by bacteria may be the solution.

New app could protect you from credit card fraud, but you’ll have to sacrifice some privacy to use it.

Scientists are finally starting to understand the centuries-old mystery of “ballooning.”

At least seven counties in Florida are under a state of emergency for a toxic algae bloom that has killed thousands of marine animals. But researchers at a lab in Sarasota say they have a machine that can fight the red tide.

The state of Florida is at war with a toxic red tide. A tide that is killing marine life along the Sunshine State’s southwest coast and creating a stench.

“The smell is just a little unbearable,” said one vacationer.